A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, Computed Properties of C3EuF9O9S3, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 52093-25-1, Name is Europium(III) trifluoromethanesulfonate, molecular formula is C3EuF9O9S3. In a Conference Paper, authors is Brown, R. Stan，once mentioned of 52093-25-1
2004 Bader award lecture metal-ion-catalyzed acyl and phosphoryl transfer reactions to alcohols: La3+-promoted alcoholysis of activated amides, carboxylate esters, and neutral organophosphorus esters
Unlike metal-ion-catalyzed hydrolysis processes, metal-ion-catalyzed methanolysis processes have received scant attention in the literature particularly from the standpoint of mechanistic studies. La3+, introduced into methanol solution as its triflate or perchlorate salt, is particularly effective in promoting methanolysis reactions of unactivated and activated esters, phosphate triesters, and activated amides such as acetyl imidazoles and lactams. Studies of the kinetics of methanolysis of these substrates as a function of solution pH and [La3+] indicate that the solution comprises lanthanum dimers with one to five associated methoxides (La23+(OCH3)1-5), the most catalytically active form being La23+(OCH 3)2, which is produced at near neutral pH in methanol (8.4). Mechanisms for all the acyl and phosphoryl transfer reactions are proposed where the metal ion serves a dual role of acting as a Lewis acid to activate the C=O or P=O system to nucleophilic attack by a metal-coordinated methoxide nucleophile. In cases where direct comparisons can be made, the La23+ catalyst system is more active for the methanolysis of nonactivated substrates than for activated substrates. Another general characteristic of this system is that the catalytic rate constant for the metal complex exceeds the second-order rate constant for free methoxide, in some cases by as much as 4600-fold. Overall the catalytic effects exhibited by the La 23+ system is spectacular for such substrates as paraoxon, where as little as 2 mmol L-1 La(OTf)3 in the presence of equimolar NaOCH3 accelerates the methanolysis by 109-fold relative to the background reaction at neutral pH and ambient temperature.
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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI